| /* SPDX-License-Identifier: GPL-2.0-only */ |
| |
| #include <amdblocks/cpu.h> |
| #include <cbfs.h> |
| #include <commonlib/helpers.h> |
| #include <console/console.h> |
| #include <cpu/amd/microcode.h> |
| #include <cpu/amd/msr.h> |
| #include <cpu/cpu.h> |
| #include <cpu/x86/msr.h> |
| #include <stdio.h> |
| #include <timestamp.h> |
| #include <types.h> |
| |
| #define CPU_MICROCODE_BLOB_NAME "cpu_microcode_XXXX.bin" |
| #define CPU_MICROCODE_BLOB_FORMAT "cpu_microcode_%04x.bin" |
| |
| struct microcode { |
| uint32_t date_code; |
| uint32_t patch_id; |
| |
| uint16_t mc_patch_data_id; |
| uint8_t reserved1[6]; |
| |
| uint32_t chipset1_dev_id; |
| uint32_t chipset2_dev_id; |
| |
| uint16_t processor_rev_id; |
| |
| uint8_t chipset1_rev_id; |
| uint8_t chipset2_rev_id; |
| |
| uint8_t reserved2[4]; |
| } __packed; |
| |
| static const struct microcode *ucode; |
| |
| /* This function requires the ucode variable to be initialized by amd_load_microcode_from_cbfs() |
| and then allocated memory should be freed by the amd_free_microcode(). */ |
| void amd_apply_microcode_patch(void) |
| { |
| uint32_t new_patch_id; |
| msr_t msr; |
| |
| if (!ucode) { |
| printk(BIOS_ERR, "%s: NULL pointer to microcode\n", __func__); |
| return; |
| } |
| |
| msr.raw = (uintptr_t)ucode; |
| |
| wrmsr(MSR_PATCH_LOADER, msr); |
| |
| printk(BIOS_DEBUG, "microcode: patch id to apply = 0x%08x\n", ucode->patch_id); |
| |
| msr = rdmsr(IA32_BIOS_SIGN_ID); |
| new_patch_id = msr.lo; |
| |
| if (new_patch_id == ucode->patch_id) |
| printk(BIOS_INFO, "microcode: being updated to patch id = 0x%08x succeeded\n", |
| new_patch_id); |
| else |
| printk(BIOS_ERR, "microcode: being updated to patch id = 0x%08x failed\n", |
| new_patch_id); |
| } |
| |
| static uint16_t get_equivalent_processor_rev_id(void) |
| { |
| uint32_t cpuid_family = cpuid_eax(1); |
| |
| return (uint16_t)((cpuid_family & 0xff0000) >> 8 | (cpuid_family & 0xff)); |
| } |
| |
| static const struct microcode *find_microcode(const struct microcode *microcode, |
| uint16_t equivalent_processor_rev_id) |
| { |
| if (microcode->processor_rev_id == equivalent_processor_rev_id) |
| return microcode; |
| |
| printk(BIOS_WARNING, "Failed to find microcode for processor rev: %hx.\n", |
| equivalent_processor_rev_id); |
| |
| return NULL; |
| } |
| |
| void amd_load_microcode_from_cbfs(void) |
| { |
| char name[] = CPU_MICROCODE_BLOB_NAME; |
| uint16_t equivalent_processor_rev_id; |
| |
| if (ucode) |
| return; |
| |
| /* Store the pointer to the buffer in global variable, so each CPU doesn't need to read |
| * the uCode from flash. Note that this code assumes all cores are the same */ |
| timestamp_add_now(TS_READ_UCODE_START); |
| equivalent_processor_rev_id = get_equivalent_processor_rev_id(); |
| snprintf(name, sizeof(name), CPU_MICROCODE_BLOB_FORMAT, equivalent_processor_rev_id); |
| |
| ucode = cbfs_map(name, NULL); |
| if (!ucode) { |
| printk(BIOS_WARNING, "%s not found. Skipping updates.\n", name); |
| timestamp_add_now(TS_READ_UCODE_END); |
| return; |
| } |
| |
| if (find_microcode(ucode, equivalent_processor_rev_id) == NULL) { |
| cbfs_unmap((void *)ucode); |
| ucode = NULL; |
| } |
| |
| timestamp_add_now(TS_READ_UCODE_END); |
| } |
| |
| void amd_free_microcode(void) |
| { |
| if (ucode) { |
| cbfs_unmap((void *)ucode); |
| ucode = NULL; |
| } |
| } |
| |
| void preload_microcode(void) |
| { |
| if (!CONFIG(CBFS_PRELOAD)) |
| return; |
| |
| char name[] = CPU_MICROCODE_BLOB_NAME; |
| uint16_t equivalent_processor_rev_id = get_equivalent_processor_rev_id(); |
| |
| snprintf(name, sizeof(name), CPU_MICROCODE_BLOB_FORMAT, equivalent_processor_rev_id); |
| printk(BIOS_DEBUG, "Preloading microcode %s\n", name); |
| cbfs_preload(name); |
| } |